Journal of Geo-information Science >
Concept of Building Multi-level Classification System Framework for Land Type Based on Grid
Received date: 2014-12-31
Request revised date: 2015-04-15
Online published: 2015-07-08
Copyright
Land type (in the former Soviet Union, it is known as "landscape", and in Europe and the United States it is known as "land system") research has an important role in the integrated physical geography. Although the study on land type has made many achievements in the domestic and foreign research and there were a lot of land type mapping practices, there are still three key academic problems to be solved: (1) how to perform the basic land type classification and hierarchy and how many levels of hierarchy are needed, while the proof of land type classification system is lacked in previous mapping practices; (2) how to choose the land type indicators at all levels; (3) how to realize computerized cross scaling graphics technology using multi-source data. In this paper, a building method of land type indicator database has been designed, which could solve these problems based on the national standard geographic grid. A four-level standard grid system model is built, and the land type classification indicators are expressed respectively by the grid cells at different grid levels. We choose area, landform, soil and vegetation, which are often used in land type research, to be the indicators in designing the building framework of the multi-level standard geographic grid indicator database. Through the design and analysis process, we point out that the multi-level geographical grid classification system has its physical basis: all earth sciences have multi-scale research features and the hierarchical classification system for each subject could be expressed by multi-level standard geographic grid system model. Especially, the three elements of landform, soil and vegetation that are often used in land type classification system research are typical, due to the interactions among them. These lead to a conclusion that the number of classification levels for the three land types’ classification systems and the scale of grid cells at each level should be identical or similar. Therefore, the building framework presented in this paper is feasible and will help to address the three issues mentioned above. This framework should be used to guide the establishment of database and further land type research.
Key words: land types; grid; indicator database; classification; multi-scale
ZHU Huazhong , WANG Juanle , ZHONG Huaping , ZHOU Lilei , YANG Hua , LIU Qing . Concept of Building Multi-level Classification System Framework for Land Type Based on Grid[J]. Journal of Geo-information Science, 2015 , 17(7) : 783 -788 . DOI: 10.3724/SP.J.1047.2015.00783
Fig. 1 Two world maps drawn during ancient Greek and Rome periods based on geographic grid图1 古希腊古罗马时期绘制的基于地理格网的世界地图 |
Tab. 1 Database building framework supporting the research of land-type index selection based on multi-level geography grid表1 基于多级地理格网土地类型分级分类指标选取研究数据库建设框架 |
格网级别及其名称 | 制图比例尺 | 各级分类指标 | |||
---|---|---|---|---|---|
地带 | 地貌 | 土壤 | 植被 | ||
10 km格网 1 km格网 100 m格网 10 m格网 | 1:1000万 1:100万 1:25万 1:5万 | 自然地带 | 大中型地貌 中小型地貌 微地貌 | 土纲/土类 亚类 土属/土种或土族/土系 | 植被型组 植被群系(组) 植被群丛(组) |
The authors have declared that no competing interests exist.
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